Table 3 Comparison between the two studied groups according to different parameters

Gingival index

Before

  Mean ± SD

1.17 ± 0.48

1.07 ± 0.36

  Median (Min.–Max.)

1.25^a (0.25–1.75)

1.0^a (0.75–2.0)

3 months

  Mean ± SD

0.27 ± 0.26

0.45 ± 0.40

  Median (Min.–Max.)

0.25^b (0.0–0.75)

0.25^b (0.0–1.50)

6 months

  Mean ± SD

0.03 ± 0.09

0.27 ± 0.20

 Median (Min.–Max.)

0.0^b (0.0–0.25)

0.25^b (0.0–0.50)

p₀

 < 0.001*

 < 0.001*

%Decrease after 3 m

82.4 ± 16.4

60.3 ± 26.4

Decrease after 6 m

1.1 ± 0.5

0.8 ± 0.3

%Decrease after 6 m

97.9 ± 5.5

74.7 ± 19.7

Bleeding on Probing %

Before

    Mean ± SD

81.7 ± 22.1

85 ± 12.7

 Median (Min.–Max.)

75^a (25–100)

75^a (75–100)

3 months

  Mean ± SD

26.7 ± 25.8

41.7 ± 32.3

  Median (Min.–Max.)

25^b (0–75)

25^b (0–100)

6 months

 Mean ± SD

3.3 ± 8.8

26.7 ± 20

 Median (Min.–Max.)

0^b (0–25)

25^b (0–50)

p₀

 < 0.001*

 < 0.001*

%Decrease after 3 m

71.7 ± 27.2

52.2 ± 34.4

Decrease after 6 m

78.3 ± 20.8

58.3 ± 20.4

%Decrease after 6 m

96.7 ± 8.8

68.9 ± 23.2

Level of mmp8 (n/ml)

Before

  Mean ± SD

2.6 ± 1.5

2 ± 1.6

  Median (Min.–Max.)

2.3^a (0.4–6.4)

1.5^a (0.4–6.2)

1 months

  Mean ± SD

1.7 ± 0.8

1.9 ± 2.4

  Median (Min.–Max.)

1.8^a (0.4–2.8)

0.9^b (0.3–9.7)

3 months

  Mean ± SD

0.6 ± 0.4

1 ± 0.7

 Median (Min.–Max.)

0.5^b (0.2–1.9)

0.7^b (0.3–2.8)

6 months

 Mean ± SD

0.3 ± 0.2

0.8 ± 0.6

  Median (Min.–Max.)

0.2^c (0.2–1.1)

0.5^c (0.2–2.6)

p₀

 < 0.001*

 < 0.001*

%Decrease after 3 m

69.2 ± 23.4

44.3 ± 21.1

Decrease after 6 m

2.3 ± 1.6

1.2 ± 1.1

%Decrease after 6 m

82.8 ± 16.2

56.8 ± 19